I buy in bulk when it's convenient or I can make it convenient. 3 5 gal plastic containers. Right now the cheapest is $1.409 versus $1.429 at Wal Mart using their card. Not worth a $2 toll to save 50 cents on a bulk purchase. I can go another way and not pay the toll, but it's another 35 miles.
Last big purchase for me was a set of snap on sockets at an estate sale, 1/2 inch drive like new for a bid of $65, missing the 12mm and 21mm so a total of 21 sockets 10mm-32mm missing 2. They catalogue for $645, used market about $250 so a nice grab.
Also two ratchets for $17.50 and a box of 50 loose sockets for $100, all snap on.
regards
mech
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View my fuel log 2015 Mirage de 1.2 manual: 55.7 mpg (US) ... 23.7 km/L ... 4.2 L/100 km ... 66.9 mpg (Imp)